i did some hefty math and figured 5.13 with 40" otr is 70 at 2800.
one of my neighbor hooked a line on a free/ hyper cheap npr that i will be checking out this week. if it looks good i can get both axle and there will be no budds/metric issues.
what rear axle was in your 350? d70/d80?
i am haveing a hell of a time getting the npr gear ratios, the dismanteler didnt record them, so i will need to dismantle 7 rears to find out which one i want.
